He's turned into a real couch potato since he lost his job.
lazy bum
Frequency:
60
%
Stop being a lazy bum and help out around the house.
sit around
Frequency:
50
%
Instead of sitting around all day, why don't you go for a walk?
bum around
Frequency:
45
%
I have no plans this weekend, just going to bum around the house.
Idiomatic Expressions for sit on your butt
Phrase: don't just sit on your butt
Meaning: to encourage someone to take action or make an effort instead of being lazy
Usage: If you want to succeed, don't just sit on your butt waiting for opportunities to come to you.