Verb (5-dan, る, transitive)
Usually written in kana
1. to turn up; to roll up (e.g. sleeves)
俺は袖をまくって腕を見せた。I rolled up my sleeve and showed my arm.
Auxiliary verb (5-dan, る)
Usually written in kana
2. to do over and over again; to do relentlessly; to do with reckless abandon; to do continuously
そういえば、私たち、みんな泣きまくってるね。Come to think of it, we're all crying our eyes out.
Verb (5-dan, る, transitive)
Slang
Usually written in kana
3. to stage a comeback (against) (in mahjong, horse racing, etc.); to come from behind