Ujebac in polish means "get dirty", sometimes it also means "to take a part of something" or "to chop off sth"
Ale sie ujebalem. (I got dirty)
Ujebalem sobie kawalek wafla. (I took a part of waffle)
Ujebie ci kutasa! (I will chop off your dick!)
Ujebac cos. (To get dirty sth or To chop of sth)