on the spot - in the place where something is happening or has just happened.

Her on-the-spot reports from war zones around the world won her several awards. (always before noun)

• be slow off the mark
• be slow on the draw
• be slow on the uptake
• be sneezed at
• be sniffed at
• be snowed under
• be soaked to the skin
• be soft on
• be soft on someone
• be sold a pup
• be someone's cup of tea
• be someone's department
• be someone's flesh and blood
• be someone's for the asking
• be someone's main squeeze
• be someone's own flesh and blood
• be someone's pigeon
• be someone's strong point
• be someone's strong suit
• be speaking out of both sides of mouth
• be speaking out of both sides of your mouth
• be spick and span
• be spitting in the wind
• be spitting into the wind
• be spoiling for a fight