The French noun bout is pronounced bou. The final t is silent.
At an informal level of Quebec French, you may however sometimes hear bout pronounced as boutte, with the final t pronounced.
On Montréal’s Rouge FM yesterday, actress (and radio host for Rouge FM) Marina Orsini exclaimed:
C’est l’fun au boutte!
It’s a whole lotta fun!
au boutte
= à l’extrême
Sometimes this informal pronunciation of bout is also spelt as boute.
Another informal expression:
C’est le boutte du boutte!
That’s the limit! (C’est le comble!)
Although you’ll hear the pronunciation boutte in certain informal expressions such as these, I recommend that you stick with the pronunciation bou everywhere else in non-informal language (e.g., au bout de deux mois).