Sticky Bomb

The Sticky Bomb is a type of bomb used in Call of Duty 2. "Sticky Bomb" a term used for an IED that made by filling a sock with some form of explosive, attaching a fuse, then sealing the sock (to prevent leakage when on the track of a tank) and covering it with Axel grease to make it "sticky". These bombs were used like Molotov Cocktails, when supplies were low and they needed to destroy tanks and such.

In-Game
Sticky bombs are used to destroy tanks in the Russian campaign

Trivia

 * They are most likely a reference to the movie Saving Private Ryan