Reese Witherspoonis comfortable using TikTok jargon in everyday life. On Monday, The Morning Show star proved once again that she's the coolest mom on TikTok with a sweet video. Joined by her son Deacon Phillippe, who she shares with ex Ryan Phillippe, Reesereceived an adorable crash course in dapping, which is a handshake that often requires hooking thumbs, pounding fists or chest bumping.