Wiktionary
phr. (context idiomatic English) An informal way to end a letter, email etc.
Wikipedia
Hugs and kisses or xoxo is a term used for expressing sincerity, faith, love, or good friendship at the end of a written letter, email or SMS text message. There is controversy as to which letter ('X' or 'O') represents which action ('hug' or 'kiss').
Usage examples of "hugs and kisses".
She hugs and kisses her sisters, breaking off bits of the skull and eating it.
First Mom and Dad walked the kids to the west entrance of the West Wing, where, after hugs and kisses, three of the kids got into their cars to drive off.
To prevent that, she started another round of hugs and kisses that included all of them.
And in what may seem to us a surprisingly short amount of time, but does not to Chipper Maxton, who understands that very few people wish to linger in an elder-care facility any longer than they must, the relatives bestow their final hugs and kisses, round up the exhausted kiddies, and file down the paths and over the grass into the parking lot, along the way a good number depositing bills in the basket atop Ragtime Willie's upright piano.
Lots of hugs and kisses, and warm greetings from the dozens of Mayfairs lolling about everywhere.