Japanese has certain words that appear to be derived from English, but are not actually used in English. These are called wasei-eigo (和製英語), literally "made-in-Japan English"
I decided to compile a random list of 20 interesting ones. Most definitions come from http://jisho.org
Japanese word: ドクターストップ
Japanese pronunciation: dokutaa sutoppu
What it sounds like in English: doctor stop
Japanese meaning: doctor's orders (to stop something, such as habits)
Japanese word: アフターサービス
Japanese pronunciation: afutaa saabisu
What it sounds like in English: after service
Japanese meaning: warranty service (customer service after a sale)
Japanese word: シルバーシート
Japanese pronunciation: shirubaa shiito
What it sounds like in English: silver seat
Japanese meaning: seat for seniors and handicapped
Japanese word: ガッツポーズ
Japanese pronunciation: gattsu poozu
What it sounds like in English: guts pose
Japanese meaning: triumphant pose assumed by an athlete; fist bump
Japanese word: ガードマン
Japanese pronunciation: gaadoman
What it sounds like in English: guardman
Japanese meaning: security guard
Japanese word: カンニング
Japanese pronunciation: kan'ningu
What it sounds like in English: cunning
Japanese meaning: cheating (e.g. on a test)
Japanese word: ジェットコースター
Japanese pronunciation: jetto coosutaa
What it sounds like in English: jet coaster
Japanese meaning: roller coaster
Japanese word: シークレットシューズ
Japanese pronunciation: shiikuretto shuuzu
What it sounds like in English: secret shoes
Japanese meaning: shoes with thick soles to make one look taller; elevator shoes
Japanese word: デコレーションケーキ
Japanese pronunciation: dekoreishon keiki
What it sounds like in English: decoration cake
Japanese meaning: decorated cake (sponge cake with cream, chocolate, fruit, etc.)
Japanese word: ネームバリュー
Japanese pronunciation: neimu baryuu
What it sounds like in English: name value
Japanese meaning: established reputation (of a name brand)
Japanese word: ダンプカー
Japanese pronunciation: danpu kaa
What it sounds like in English: dump car
Japanese meaning: dump truck
Japanese word: マナーモード
Japanese pronunciation: manaa moudo
What it sounds like in English: manner mode
Japanese meaning: silent mode (on a cell phone)
Japanese word: マイブーム
Japanese pronunciation: mai buumu
What it sounds like in English: my boom
Japanese meaning: current personal obsession
Japanese word: ジェンダーフリー
Japanese pronunciation: jendaa furii
What it sounds like in English: gender free
Japanese meaning: gender equality
Japanese word: マッチポンプ
Japanese pronunciation: matchi ponpu
What it sounds like in English: match pump
Japanese meaning: stirring up trouble to get credit from the solution (lighting a match to put it out yourself with a water pump)
Japanese word: ポケットベル
Japanese pronunciation: poketto beru
What it sounds like in English: pocket bell
Japanese meaning: pager or beeper
Japanese word: マイナスドライバー
Japanese pronunciation: mainasu doraibaa
What it sounds like in English: minus driver
Japanese meaning: flathead screwdriver
Japanese word: プラスドライバー
Japanese pronunciation: purasu doraibaa
What it sounds like in English: plus driver
Japanese meaning: Phillips head screwdriver
Japanese word: ナイスミドル
Japanese pronunciation: naisu midoru
What it sounds like in English: nice middle
Japanese meaning: attractive middle-aged man
Japanese word: ラストヘビー
Japanese pronunciation: rasuto hebii
What it sounds like in English: last heavy
Japanese meaning: final effort before the end
Warning: studying too much wasei-eigo might cause one to mix up the meanings of some English words