pooch

noun

1. (informal)A dog.

   “She’s just been playing with the pooch ever since they got in the field.”

   “My thoughts are disturbed by a man and pooch trying to get off the front of the train. Despite hitting the door button, they refused to open.”

   “The pup wasn’t only the same breed as her pooch, Piper, but the same color as well.”

2. A dog of mixed breed; a mongrel.
3. (countable, informal)A bulge, an enlarged part.

   “There's a pooch in the plastic where it got too hot.”

4. (countable, informal, uncountable)A distended or swelled condition.

   “Her left sleeve has more pooch at the shoulder than the right.”

5. (broadly, countable, informal, uncountable)The lower belly region; often in reference to the stubborn fat stored in the abdominal area.

   “See also: paunch”

verb

1. (informal, intransitive)To distend, to swell or extend beyond normal limits; usually used with out.

   “Inflate that tire too much and the tube may pooch out of the cut in the sidewall.”

   “There were rustling sounds from the tent and the sides pooched out as if they were trying to stand up.”