欠:owe 我欠你五欧元。 I owe you five euroes.
揍:beat/hit for example when u do something wrong, maybe ur dad will 揍你. such as kicking ur ass.... :D
你是不是欠揍?你欠揍吗?
when somebody is totally over ur line, u can say these phrases to him. they are questions but they mean that "I can not stand/bear what u are doing".
but in some cases, such as parents to kids or girlfriend to boyfriend say these phrases, maybe it is a kind of joke.
ofc, among friends, u can say these too. it is just like "I will kick ur ass" u know, if u say this to ur friend, maybe it is just a joke.