OR ELSE

or else   ( SI NO / DE LO CONTRARIO )

1 if notsynonym otherwiseHurry up or else you'll be late.They can't be coming or else they'd have called.

2 used to introduce the second of two possibilitiesHe either forgot or else decided not to come.

3 (informal) used to threaten or warn someoneJust shut up, or else!
MORE INFO: http://oaadonline.oxfordlearnersdictionaries.com/dictionary/OR+ELSE#else__22