“I bet the traffic at the beach this weekend'll be insane.”
You're planning a trip to the beach this weekend. The weather forecast says that the weather will be great, and it's a holiday weekend, so you think there will be a lot of people there. You say this to your wife.
I bet the traffic at the beach this weekend'll be insane.
Saying "I bet..." is a casual way of guessing about something. You can use this in all kinds of situations where you are guessing about something and want to compare what you think with what other people think:
I bet there'll be a lot of traffic at the beach this weekend.
I bet you can't guess what just happened to me.
I bet the meeting this afternoon will be pretty short since David's not here.
The word "will" can be contracted to "'ll" after a noun like this:
My wife'll give you a call later.
The sun'll be setting soon.
No one'll find out!
This happens in casual spoken English. Avoid it when speaking or writing formally.
"Traffic" means the number of cars that are driving in an area:
How's the traffic in Dallas?
The traffic is pretty heavy this morning on the East side.
Some adjectives that we use to describe traffic include:
heavy (lots of cars)
light (not many cars)
crazy (lots of cars)
insane (lots of cars)
We usually refer to cars when we use the word "traffic", but sometimes it can also mean the number of people walking in a certain area. In that case, you might use the phrase "foot traffic":
That part of the building gets a lot of foot traffic.
We often use the word "the" in front of "beach":
I'm going to the beach this weekend.
I love the beach!
You can say "the beach" even if your listeners don't know which exact beach you mean.
A "beach", of course, is anywhere next to the ocean, especially somewhere where people go swimming. Sometimes swimming areas on lakes are also called "beaches", but you probably wouldn't call one of those areas "the beach".
"Insane" is another way to say "crazy".
English speakers sometimes use "insane" and "crazy" to talk about things that are very busy or active:
Work this week has been insane! I've had to stay late every night.
Wow, look at all these people. This is crazy!