빠질만 하니까 빠지는 것 같긴 한데.. 이제 좀 쪄야 한다. => 빠질 만하니까 빠지는 것 같긴(=같기는) 한데 .. 이제 좀 쪄야 한다. => Probably I'm losing weight for understandable reasons ... but now I might as well put on some. * (살이) 빠지다 = lose weight. (살이) 찌다 = put on weight. 살이 may be omitted if the context is about your weight or dieting. It uses a few useful idiomatic phrases. * V-ㄹ 만하다 = It's as expected [understandable / no surprise] to V / There is a reason enough to V. "화를 낼 만하다". * A-기는 하다 = It does appear to be A (concedes or reaffirms a fact, like "I give you that it's A"). "좋기는 하다". * V-야(만) 한다 = should/must/had better V.. "나는 떠나야(만) 한다" (만 strengthens the meaning).