Narcissistic Behavior

verb to boast or show off about one's achievements or possessions

• She was caught bragging about her accomplishments during the meeting.
• He won't stop bragging about his new car to everyone.
• She's always bragging about how much money she makes.
• Stop bragging about your success and start focusing on helping others.

adjective having or showing an exaggerated sense of self-importance; conceited

• His egotistical behavior made it difficult for others to work with him.
• She can be so egotistical sometimes, always talking about herself.
• That guy is so full of himself, he's seriously egotistical.
• His ego is as big as a mountain, he's truly egotistical.

adjective describes someone or something that is primarily concerned with their own interests and promotes them above all else

• The politician's self-serving actions were widely criticized by the public.
• She always has a self-serving attitude and only cares about herself.
• Don't be so self-serving, think about others for once.
• His self-serving behavior was like a wolf in sheep's clothing, deceiving those around him.