Banter about a persons mother. Frequently includes sexual references.
Guy 1:"Ahahaha Jamie your mums knockers are HUGE!"
Guy 2:"Aha, janter mate."
A fusion of the word Jack and Banter to form Janter meaning banter that is a bit naughtier than normal, banter from Jack the lads that may be slightly more insulting than hoped and pushes the boundaries of political correctness.
Why are you so fat??? ->>>> because every time I do your mum she gives me a biscuit!! Calm down its only a bit of Janter!
Conversation that is witty and at the same time abusive between Jews.
Jewish friend one jokes to jewish friend two - "that's a nice-looking yarmulke you're wearing, but it would look even better lying next to my bed tomorrow morning..."
Jewish friend two - "Hahahahahaha good janter!!"