Lucu = funny = cute
In English the word "lucu" (Indonesian) has two meanings ..
1. Funny
example : Lawakanya sangat lucu (his joke so damn funny),
2. Cute
we usually use the word "lucu" to express how "cute" a thing/person is
example : Boneka ini sangat lucu ( this doll is so cute)
Gadis itu sangat lucu ( that girl is very cute)
So, when u talk with Indonesian and they said you "lucu" .. could be you funny or you look cute :D