The act of not giving a damn and doing as little as possible.
Shammers are usually lazypeople that smoked lots of weed back in the day and joined the Army, thus becoming shit bags and shamming out on everything. Shammers also carry around a belief of FBGM.
Obadiah: You really think that just because Apple have an idea, it belongs to them?
Anthony: Yes! If you disagree, you're shameless like shamesung and I despise who you are on a cellular level.