Press T in-game to open the console and type one of the following.

Effect	Code
???	/TheQuick
50% slow motion speed, insert your own value.	/slomo 0.5
Gives all guns and items	/packinheat
Gives you infinite Firefighter Water Pipe	/FLUDD
God Mode	/alamode
Highter jump	/Jumpman
No Clip	/ifeelfree
Sanic speed	/sanic
Sonic speed	/sonic
Suicide	/Aneurysm