Have a few kangaroos loose in the top paddock Australia verb phrase slang
Have eccentric ideas, behaviours or actions; be crazy
I think he has kangaroos loose in the top paddock when he just keeps talking to himself all day.
Jonas must have had a few kangaroos loose in the top paddock when creeping in that forest at midnight.
John might have had a few kangaroos loose in the top paddock when believing that he would pass the exam without any preparation.
Very stupid, or silly
A very offensive term used to describe an upper-class British man who is stupid or inexperienced
Stupid or crazy
(n): a fool person,
(adj): stupid, foolish, silly
The verb "have" in the phrase should be conjugated according to its tense in the sentence including it.
If you swallow the bait, you take something that someone offers you, or agree to do something that someone asks you to do without knowing that it is a trick or way of getting something from you.
You can't just do whatever he wants you to do. Don't swallow the bait.