When a fat guy doesn't have the bodydefinition of somebody who is considered traditionally muscular, but has some proportional features, such as muscular arms, that make his fat guy features look acceptable.
Alec Baldwin is in pretty good shape for a fat guy.
Donk is another word for penis, on swole meaning errect.
Hence meaning keeping ones penis erect.
From the song, "I'm in love with a stripper REMIX, featuring Akon, R. Kelly, Twista -DIRTY" At 3.45" R.Kelly say's, "Reeereeereee coming down the pole, ain't no secret why i'm here; cause you keep my donk on swole"
When one exercises (often using bodybuilding parameters) to such an extent that his or her body becomes literally "swollen" with muscle. Simply put, it's when one becomes buff.
Lantry: i been hittn dagym an I be gettin' lumpy as hell
Scott: So fascinating! Well buddy, I think you have certainly increased your muscle mass as of late. Would ya be a pal and teach me how to also become more muscular?
Lantry: heeeeeh(ll) yeah, my white nigga. We gonna' get swole! Go ahead an grab Ebenezer! See if he wanna go!
Scott: Golly, ya mean i can bring my compadre? Gee willikers, I'm roused!
Lantry (partially to himself): haha, dad nigga said "gee willikers!". Hahaha
Guy #1: "Damn, man! You've gotten alot bigger since the last time I saw you."
Guy #2: "Yeah dude, I'm benchin' up to like 300 now."
Guy #1: "BIG SWOLE!"