/ ˈlɒtə; NAmE ˈlɑːtə/
(also lotsa / ˈlɒtsə; NAmE ˈlɑːtsə/) ( informal , non-standard ) a written form of 'lot of' or 'lots of' that shows how it sounds in informal speech :
We're gonna have a lotta fun.
HELP NOTE : You should not write this form unless you are copying somebody's speech.