slath·er 
/ˈslæðɚ/ verb
slath·ers; slath·ered; slath·er·ing /ˈslæðɚ/ verb [+ obj] : to cover something with a thick layer of a liquid, cream, etc.
▪ We ate lobster slathered with/in butter ▪ She slathered her skin with sunscreen. = She slathered sunscreen on her skin.
▪ We ate lobster slathered with/in butter ▪ She slathered her skin with sunscreen. = She slathered sunscreen on her skin.
