Insulting someone by mocking their baldness.
Elisha was mocked by a group due to his baldness and apparently God strongly disapproved. Read below what happened to 42 of them.
2 Kings 2:22-24
22 So the waters have been purified to this day, according to the word of Elisha which he spoke.
23 Then he went up from there to Bethel; and as he was going up by the way, young lads came out from the city and mocked him and said to him, “Go up, you baldhead; go up, you baldhead!” 24 When he looked behind him and saw them, he cursed them in the name of the Lord. Then two female bears came out of the woods and tore up forty-two lads of their number.
Scripture quotations taken from the "NASB" ( www.lockman.org
Love blesses others even when it is at it's own expense. Selfish behavior takes its pleasure even if it is at another person's expense.