You will need the bell bottom pants mesh for the slimmer bodybuilder from
here for these to show up in your game.
Here are 16 casual outfits for the slimmer bodybuilder, consisting of a batik print t-shirt with jeans.
They are organised into 4 sets with 4 outfits in each set.
Set 1.

Set 2.

Set 3.

Set 4.

Credits:
Mesh - Marvine