I'm looking for a hilarious fic I read on AO3, not too long, maybe part 1 of a series. Set after CA:WS. Steve is sick (or sth) at Sam's place and somehow Bucky ends up filling in for him, featuring a lot of Bucky going "how does this shit keep happening to m– oh right, STEVE". The fic had me in literal tears when I read it.
One of the main points of hilarity is that, when Bucky tries to put on the suit, it turns out that he's just not quite big enough to fill it, so Sam pulls out these fake boob gel pads he has left from some bachelor party or other and they stuff the suit. Later, when the villian shoots tranquilizer darts at Bucky!Cap, they end up hitting the pads instead of Bucky.
Does anyone recognize this? I'm kicking myself for not bookmarking this when I first read it. :((
EDIT: I found it! It's Bucky Barnes Is Five Eleven, and Other Lies He Tells Supervillains by AggressiveWhenStartled