Any type of chalky, hardening compound used in building construction. Products such as drywall joint compound, floor leveling compound, etc.
Customer: How long will it take to finish the drywall?
Drywall contractor: About a week. We need to hang it, then apply the first coat of magumpus. I need to come back a couple days later and apply another coat of magumpus. Then sand the magumpus and paint the walls.
Customer: What are you gonna do about the floor? It slopes down toward the center of the room.
Contractor: Well, I need to mix up some magumpus, pour it on the floor to make it level, then put a layer of plywood over the floor.
(verb, transitive) -- To put salt on something. Can be used for any method (shaker, paper packet, twisting a sea-salt dispenser, etc.), but the word comes from the sound of using a salt shaker (shoonk, shoonk, shoonk). The double-O is pronounced like the one in the word "foot".
My fish needs some salt. I need to shoonk it.
"Do you want me to shoonk your eggs?" "No, I don't like salt on eggs."