When you're gasping for a reason to not do something... Feverishly digging through your emails, but no one has sent you an email in a week... You might to have attend a meeting at work,.. But no. No you don't... Because you're officially swamped.
Your relatives invited you to a reunion but you're on staycation for the next two week but you won't make it because you're simply swamped.
When Shrek smokes you out, after which you are trapped hanging out with him for the rest of the day putting up with his shitty driving, and listening to his shitty music.
when the male is performing doggy-style sex on his partner while he/she is turned around he puts on a shrek mask and stops - when said partner turns around he would shout 'what are you doing in my swamp?' and then proceed to sodomize their partner.