"Okay, have fun."

except it's generally used in a more dismissive sense as most kind people tend not to condense "have fun" into just two letters unless they're driving, in which case they're douchebags for texting while driving.
Jane: "Fuck you. Don't bother calling me back!"
Alex: "khf"
by AnAnonymousThrowawayAccount August 1, 2011
Get the khf mug.
Peak boredom. You will ascend to a godly status 48 hours after typing this in Google Chrome, Firefox, Internet Explorer, and Microsoft Edge in the timeframe of 20 seconds. If you fail, you will feel empty forever without any way to make up for your wrongs.
Person 1: Let's have a bored typing contest.
Person 2: qwertyuiopoiuytrewq
Person 1: `1234567890-=qwertyuiop\asdfghjkl;'zxcvbnm,./
Person 2: ~`!1@2#3$4%5^6&7*8(9)0_-+=QqWwEeRrTtYyUuIiOoPp{}|\AaSsDdFfGgHhJjKkLl:;"'ZzXxCcVvBbNnMm<,>.?/
Person 1: `~1qaz!QAZ2wsx@WSX3edc#EDC4rfv$RFV5tgb%TGB6yhn^YHN7ujm&UJM8ik,*IK<9ol.(OL>0p;/)P:?-'_{"=+}\|
Person 2: `24680=wryipadgjl'xvn,/.mbcz;khfs\outeq-97531!#%&(_QETUO{|SFHK:ZCBM>?<NVX"LJGDA}PIYRW+)*^$@~
Person 1: Don't you know what you have done?

Person 2: *ascends*
by QwertyBored December 20, 2019
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I was really bored so I typed in: `24680=qetuo\adgjl'zcbm./,nvx;khfspiyrw-97531~@$^*)+QETUO{|ADGJL"ZCBM>?<NVX:KHFS}PIYRW_(&%#!
by Bobbitta February 10, 2022
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