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напортачить v stresses
gen.	boss; balls up; make a botch; drop the ball (Anglophile); foozle (Anglophile); blunder (Arleyn); bungle (alindra); do a job on (sb., sth., в чём-л.); flub up (dkozyr); ball it up (Alexey Lebedev); make a pig's ear of (sth.)
Игорь Миг	foul up; botch up; botch it up
austral., slang	cock up
brit.	make a pig's ear of something (Anglophile)
inf.	screw up (g e n n a d i); botch (DC); be asleep at the wheel (Nevtutor); gum up the works (Please, Bill, be careful and don't gum up the works. Вадим Александров); mess up (george serebryakov)
irish.lang.	make a hames of (Андрей Шагин)
low	fuck up (В.И.Макаров)
Makarov.	bugger up; cocker up; make a cock-up of something; muck up
Makarov., inf.	screw up (в чём-либо); bollix up (дело, работу)
rude	bugger up
slang	to slinky a cog; biff (plushkina); blow it (VLZ_58); do a job (Yeldar Azanbayev); pull a Monica (Inspired by the television show Friends VLZ_58); slip a gear (VLZ_58); cock it up (= screw it up marina_reese); do a job on
slang, Makarov.	slip a cog

напортачить: 9 phrases in 5 subjects

Chess	2
General	4
Informal	1
Makarov	1
Slang	1