Mamamoo's Hwasa's line 'Me, me 4 with sun' in «Yes I Am»

'4 with sun'=사랑해 (saranghae) "I love u"

• 4=사 (sa)
• With=랑 (rang)
• Sun=해 (hae)

So it basically means 'I love myself' or 'I love me, me'.

To dance in a sexy manner

To refer to oneself as having four limbs. Often analogous with being whole and ordinary.