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двоечник n stresses
gen.	non-achiever; underachiever (Халеев); a D student (i say); non achiever; low scorer (источник – goo.gl dimock)
Игорь Миг	D-student (M.Berdy, TMT (2016))
Gruzovik, inf.	student with only the lowest grade "two" in his record
inf.	student with only the lowest grade "two" in his record; washout (Andrey Truhachev); dead loss (Andrey Truhachev)
slang	a slacker (mahavishnu); a screw-up (mahavishnu)
"двоечник" n
ed.	flunker (Solidboss)

двоечник: 2 phrases in 2 subjects

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