A lobster is a term commonly used to describe old people who do nothing but sit on the beach all day, which over time, turns them a painful, lobster-like shade of red.
"Yo, Fred! Check out those lobsters cooking themselves on the beach over there!"
"Whenever I go to a hot place, the beaches are usually full of lobsters... It makes me want to avoid the beach."
n. Horrible-looking multi-clawed crustacean prized as food by maritimers unable to access adequate supplies of beef.
By geeze there Billy. I could really go for some lobster claw soup just now, by here, eh, Billy me boy? Think I'll quay the dory and tie on a bib? How's by you?