What it means
It means leaving humbled, embarrassed, or properly put in your place after coming in too loud. You use it when someone chats big, picks the wrong battle, then suddenly goes quiet and slinks off looking deflated. Very common for arguments, workplace clashes, sport banter, or any moment where swagger melts into sheepish retreat.
Usage examples
"He strutted in like he owned the boozer, mouthed off at Sarah, got shut down in seconds, then legged it home with his tail between his legs."
"He stormed in demanding a refund and left with his tail between his legs."
"After losing the bet so badly, they slunk off with their tails between their legs."
"He was giving it the big one in the group chat, then Maya posted the receipts and he came back the next morning with his tail between his legs."
"They laughed when she said she'd smash the interview, but after ten minutes with the manager she walked out with her tail between her legs."
Where it comes from
It comes from dog body language. A frightened, submissive, or beaten dog will tuck its tail between its legs and back off. English took that image and turned it into a neat little jab for people who leave looking ashamed, defeated, or suddenly a lot less mouthy than when they arrived.
